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Common Ragwort

Asteraceae

Common Ragwort (Jacobaea vulgaris)

Jacobaea vulgaris

Easy ☀ïļ Bright indirect ⚠ïļ Toxic to pets

An extremely low-maintenance, self-sufficient wildflower outdoors; should never be grown near grazing pastures or stables because of its toxicity to livestock.

💧 Watering

Every 14 days

☀ïļ Light

Bright indirect

ðŸŒĄïļ Temperature

-15° - 30°C

ðŸ’Ļ Humidity

40% - 70%

Categories

What is Common Ragwort?

Common Ragwort (Jacobaea vulgaris) is a easy-care plant from the Asteraceae family. Common ragwort (Jacobaea vulgaris, syn. Senecio jacobaea) is a biennial herbaceous plant in the daisy family (Asteraceae), native to northern Eurasia and now naturalized worldwide. It forms a leaf rosette in its first year and a flowering stem up to 2 m tall in its second, bearing clusters of bright...

Common Ragwort grows up to 2.0m, spread of 50cm, watering every 14 days, -15°C – 30°C, 40–70% humidity. It is not suitable for indoor environments and not safe for pets.

Unlike many tropical plants, Common Ragwort tolerates watering mistakes. Best for beginners. Without precautions, ingestion can cause irritation in pets. Keep out of reach of cats and dogs.

How to Care for Common Ragwort?

TLDR: Common Ragwort needs Bright indirect, watering every 14 days, and temperatures between -15-30°C with 40-70% humidity.

💧

How Often Should You Water Common Ragwort?

Very drought-tolerant; water only during prolonged dry spells, letting soil dry out between waterings.

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How Much Light Does Common Ragwort Need?

Prefers full sun to partial shade; best flowering occurs in full sun.

ðŸŠī

What Is the Best Soil for Common Ragwort?

Poor, well-draining soils, sandy to loamy; tolerates compacted, low-fertility ground.

What Is Common Ragwort and Where Does It Come From?

Common ragwort (Jacobaea vulgaris, syn. Senecio jacobaea) is a biennial herbaceous plant in the daisy family (Asteraceae), native to northern Eurasia and now naturalized worldwide. It forms a leaf rosette in its first year and a flowering stem up to 2 m tall in its second, bearing clusters of bright yellow daisy-like flowers from summer into autumn. It grows wild on wasteland, roadsides, and poor grazing pastures. WARNING: this plant is toxic, containing hepatotoxic pyrrolizidine alkaloids dangerous to horses, cattle, and humans, particularly when dried in hay.

How to Propagate Common Ragwort?

ðŸŒą

Seed sowing

Self-seeds very readily; in many regions it is a regulated noxious/invasive weed, so check local regulations before deliberate propagation.

  1. 1
    Collect the fluffy pappus-bearing seeds once flower heads dry
  2. 2
    Scatter over poor, well-draining soil without covering (needs light to germinate)
  3. 3
    Keep lightly moist until germination

Materials needed:

Mature seedsUncovered poor soil
⏱ïļ Time: 2-3 weeks to germinate 📊 Success rate: high 🗓ïļ Best season: plant.autumn or spring

How Big Does Common Ragwort Grow?

TLDR: Common Ragwort can reach up to 2.0m tall with Fast growth rate.

📏

Max height

2.0m

↔ïļ

Spread

50cm

📈

Growth rate

Fast

🍃

Foliage

Deciduous

⚠ïļ

Warning: Toxic Plant

This plant can be toxic if ingested. Keep out of reach of:

ðŸą Cats ðŸķ Dogs ðŸ‘ķ Children

Plant Uses

🌚

Ornamental

Great for decoration

Is your plant showing symptoms?

Click on the symptom to discover possible causes:

What Diseases Commonly Affect Common Ragwort?

TLDR: Common Ragwort is susceptible to 3 known diseases. Monitor regularly for early detection.

Fun Facts

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A single plant can produce 2,000-2,500 flowers in one season

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It is the host plant for the black-and-orange cinnabar moth caterpillar

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The name 'jacobaea' honors St. James, since it typically flowers around 25 July, his feast day

Frequently asked questions

Is common ragwort toxic?
Yes, it is highly toxic due to hepatotoxic pyrrolizidine alkaloids. It is especially dangerous to horses and cattle, particularly when dried and mixed into hay, but also poses a risk to humans through contaminated honey, milk, or herbal infusions.
Where does common ragwort grow?
It is native to northern Eurasia and grows wild on wasteland, roadsides, dunes, and poor pastures, preferring dry, well-draining soil in full sun.
Is common ragwort good for wildlife?
Yes, it is one of the UK's top nectar-producing plants and is the host plant for the cinnabar moth caterpillar, supporting over 70 insect species overall.

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Sources & References

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